1. The problem statement, all variables and given/known data Objects with masses m1 = 12.0 kg and m2 = 4.00 kg are connected by a light string that passes over a frictionless pulley. If, when the system starts from rest, m2 falls 1.00 m in 1.70 s, determine the coefficient of kinetic friction between m1 and the table. 2. Relevant equations Fg = Fn = mg F = ma μ = Ff/Fn 3. The attempt at a solution Fg = mg Fg = 16*9.8 Fg = 156.8 = Fn F = ma [m2] = 4*9.8 = 39.2 ƩFx = m2 - Ff (sum of all forces in the x direction is = m2 - Frictional force) = 39.2 - Ff Ff = 39.2 μ = Ff/Fn μ = 39.2/156.8 μ = .25 I tried entering the coefficient of kinetic friction into the "submit box" but the answer is incorrect. could somebody please point out my mistake?